Single-trigger double-barrel gun.



No. 893,839, PATENTED vJULY 21, was.

E. M. FUNK. slNGL-E TRIGGER DOUBLE BARREL GUN.

APPLIOATIOH FILED MAE. 28, 1907.

2 SHEETS-GEEFT l.

/VE VS NQ. 893,839. PATENTE) JULY 21, 190s.

E. M. FUNK. www Damm BARREL GUN.

Z SHEETS-SHEET 2.

A' TKO/mfg YS EDGAR M. FUNK, OF WYTHEVILLE, VIRGINIA.

SINGLE-TRIGGER D DUB LE -B AEREI, GUN.

Specification of Letters Patent.

Patented July 21, 1908.

Application filed March 23, 1907. Seria1-No. 364,132.

To all whom it may concern:

Be it known that I, lEDGAR M. FUNK, a citizen of the United States,residing at '.Wytheville, in the county of FVythe and State of Virginia,have invented a new and useful Single-Trigger Double-Barrel Gun, ciwhich thefollowing is a specification.

This invention relates to single trigger mechanism for d 'ouble barrelguns.

One object fof the invention is to provide a mechanism of simple.character which may be readily shifted for the purpose of dischargingthe right and left barrels in the order named, or the left and rightbarrels consecutively. v

A further object of the invention is to provide a mechanism of suchconstruction as to prevent the possibility of involuntary dischargeofthe second barrel from the recoil or rebound due vtothe discharge of the'iirst barrel.

A still further object of the invention is to provide a mechanismfofsimple character in which all 'of the parts are carried by the frame 'ofthe gun' being freel from the trigger or other movable parts, so thatgreater stability and strength is insured.

With these and other objects in view, as will more fully hereinafterappear, the ini ventionconsists in certain novel features ofconstruction and arrangement of arts, hereinafter ully described,illustrated in the accompanying drawings, and particularly pointed'outin the appended claims, it

being understood that various changes in the form, proportions, size andminor details of the structure may be made 'without departing from thespirit or sacrificing any of `the advantages 4of the invention. l

In the accompanying drawings Figure 1 is a sectional elevation of aportion oi the frame and breech block of a gun, illustrating asingleltrigger mechanism constructed in accordance with the invention. is asectional plan view of the same, the parts being adjusted to positionfor'iiring the right barrel in advanceof the left barrel. Fig. 3 is atransverse sectional view on the line 3 3 of Fig. 2. Fig. 4 is a viewsimilar to Fig. 2, illustrating the parts adjusted for iiring the leftand right barrels in the order named.. Figl' is a detail perspectiveView of the mechanism detached. Fig. 6 is a longitudinal sectionalelevation illustrating a slight modification of the invention. Fig. 7 isa plan view of the same Fig. 2'

partly in section. Fig. 8 is a transverse' sectional view on the line 88 of Fig. 7.

Fig. 9 is a sectional view illustrating a still further modiiication ofthe invention. Fig. l0 is a rear elevation of parts of the mechanismshown in Fig. .9. Figs. 11 and 12 are detail views illustrating a meansfor positively holding the sear engaging lever in elevated positionuntil afterthe trigger has been fully released.

Similar numerals of reference are employed to indicate correspondingarts throughout the several iigures of the rawings.

ln the irearm shown in the drawing, the breech block A, hammers B, BQand sears C, C are or any ordinary construction and are operatedl in theusual manner. The frame D is of the usual type and is provided with apivot e for a trigger E which may be of ordinary construction, thetrigger being preferably mounted at a point midway of the width or theframe.

At the rear face of the breech block are arranged beari'ngs 10 for therece tion of a transversely disposed arbor or s aft 11 on which aremounted twosleeves 12 and 13, each of which may rock independently ofthe other. lrojecting forwardlyfrom the sleeves 12 and 13 are rockerarms 14 and 15, respectively, these being arranged in such position thatthey will be engaged by the hammers B,

'B/ as the latter are cocked, the rocker arms being moved downwardagainst the action of a torsion spring 17. provided with approximatelyvertical .cam arms 18 and 19, the rear faces of which are engaged by theoutturncd ends of said vspring 17. The spring is fornied of a singlepiece of wire having a central loop that projects The sleeves arefurther within a recess in the breech block, the ends i of the wirebeing thence coiled around the shaft 11 and havinOr outwardly bentterminalstha't engage with the arms 18, 19, as described.

Extending transversely of the lower frame plate is a plate 20 that isprovided with slots Y 21 through which extend guiding studs in the formof screws 22 that pass into threaded openings in the frame plate, 'thesestuds serving to guide the plate 20 as the latter is shifted between thetwo positions shown in Figs. 2 and 4, and the extent of the shiftingmovement being determined by the engagement of the ond walls of theslots with t e studs. The opposite ends of the plate 20 are rio providedwith upturned ears v23 from which project screws or studs 24 that extendthrough openings 25 formed in the side walls or the frame, but do notproject beyond the outer tacos of said side walls. These studs are soarranged that by the employment of any small tool, stick, or the like,the plate '20 may oe shifted Virom the position shown in niig. 2 to thatillustrated in e, or vice" versa, or the studs, if necessary, may bearranged to project beyond the side walls of the frame in convenientposition to be manipulated by the ngers.

The plate Z0 is provided with apair of lockingnotches 26 arranged to beengaged by a small spring 27 that is secured to the lower 'frame 1)lateby a screw 2S. plate is shiilted from one position to the other, vthespring will engage in one or other of the depressions and will lock saidplate in its adjusted position.

rihe plate 2() carries a screw or stud '.29 on .which is pivoted a lever30, said lever having a rearwardly extended arm 31 that is reduced inthickness in order that it may form a spring, and at the rear end of thearm is an enlarged head 32 which may be moved under f 'either of thesears C, C as shown in Figs. 2 and e, while the lower face of the armwill at ali times remain in' operative relation to the trigger, so thatwhen .the latter is pulled, the

will be forced up and one or other or the sears be moved to ham ierreleasing position. When pressure on the trigger is reV iieved, theresiliency of the arm 81 will carry itdown to initial osition.

i/it the forward) end of the lever 39 is a i vcam 34 having oppositelyinclined or pointed Jraces which. are arranged to be engaged by the camarms 18 and 1Q, one or other or' the arms acting on the cam 3d to shirtthe position of the lever 30, and the active arm being determined by theposition oi the plate 20, so that when in the position, shown in 2 thecooking of both hammers will result in "downward movement of the rockerarms 14, y15, and rearward movement oic the cam arms 18, 19, but the arm18 only will act on the cam 34, and will shift the rear end of the leverto the position shown in Fig. Should the parts be adjusted to theposition shown in -Fig. Li where the left barrel is to be 4dischargedirst, the cooking oi' both hamy mers 'will operate as before to depressboth g5-rocker arms 1e, and move both cam arms 18 and 1) rearward, andin this the arm 1Q alone will act on the cani and will shift the lever3G to the position'shovm in Fig. e, so that in thiscase the lett barrelwili he discharged iirst.

Securedy to the lower trame plate is a pair oi' springs 38 and 39 whichare arranged to engage the lever 3G a* a point to the rear or" "fhtrtsadiig, 2 the 'the discharge of the right barrel.

spring 38 aloneis active, and the spring 39 does not come into'play.-Vfhen adjusted to the position shownin Fig. 4, the spring 39 is activeand the spring 38 is idle.

In the operation of the parts as thus far described, reference being nowhad to Figs. 1, 2 and 3, a pull on the triggerfE. will raise the lever30 and the head 32 will be moved upward against the sear C pushing thelatter to `hammer releasing positioivand ei'liecting This isaccomplished against the resistance offered by the spring arm 3i, and solong as the pull on the trigger continues,the leverBO will beVirictionally held between'the trigger and the lower face or' the Sear.As the trigger pull is' released, either voluntarily or involuntarily onthe recoil or rebound, the spring arm 31 will follow the downwardmovement oi the trigger and will bear against the latter withA sulicientforce to prevent movement of the lever to the left under the influenceof the spring 38, this 'frictio'nal binding of the lever serving toprevent such abrupt shitting as would bring it immediately to a positionunder the left hand sear, and in case or' involuntary pulling ot thetrigger due to the rebound of the trigger against the finger, or tocontraction of the muscles, the irictional grip between the trigger andthe arm will simply be increased to an extent proportionate to thedegree of pressure exerted on the trigger, and it is not tuntil thetrigger is 'fully released and the arm allowed to move down that thespring 38 can act to throw the lever over to a position under the lefthand A second pull of the trigger moves the lever upward and results indischarge of the'left barrel. On the usual cooking move ment, bothhammers .are thrown baclr and will engage with the arms 14:, 15. Bothsleeves 12 and 13 will be rocked and both 18 19 will be thrown rearward.At this time the rear end or' the lever 30 is under the left hand and asthe parts otherwise in the position `shown in Fig. 2 the cam arm 18'will act on the cam 34 and the lever 30 will be turned to the positionshown in Fig,l 2 against the resistance offered by the spring 38 inreadiness for a second operation.

Should the plate 2O have been shifted to the position. shown in Fig. 4,the 'operation will be ictly the reverse oi that stated, the leverbeingtir-.st actuated to discl'iarge the lett barrel, and then 'n over to aposi-- tion under the right han ear and on cr l'- ing movement the arm1Q i:

)nld act to restore the lever to position under the left hand sear.

In the modified construction. shown in Figs. 6, 7 and 8,'the shaft 11carries 'two loose cam wheels 18 and l9,.these being acted upon by torion springs 17 that tend toV turn them the direction indicated by thearrow Fig. t from each of the mits the cam disk 18. to rotateand theface of .the cam leaves the upwardly extending sesffse disks is athe'path o hammers, so that when the latter are cocked, the cam .diskswill be turned in a direction opposite to that indicated by the arrows.The lowerirame plate has guides 43 for the reception of a slide bar orplate on which is mounted va pivot stud 29 carrying alever 30', the reararm of the lever being reduced in thickness to form a spring of thecharacter previously set forth, and the extremerear end of the leverforming an enlarged head 32 that is arranged to extend between the searsand the upper portion of the trigger, the latter in this instance beingprovided with a protruding top piece 44.' rllhe front end of the leveris in the form of an upwardly extending -arm. 34 which is arranged to heengaged by the cam face of the disks 18, l9,

pin 42, the pins being disposed in movement-oi2 the rear faces of theand the lever proper is actuated upon by twoA springs 38"39" in themanner previously described.

In the drawing, the mechanism is shown as adjusted for thevring of theright and left barrels in the order named and both hammers are showncocked. Il the. trigger is pulled the rear end of the lever 30 lwill beraised and the righthand sear will be moved to release position allowingthe hammer to sprmg forwardto firing position. This perarm 3ft of thelever,- whereupon the spring 38 shifts said lever to a position underthe left hand sear, S0 that on the second trigger pull theleft barrelwill be discharged. In

this case, also, it is to be observed that the resiliency of theupwardly extending arm. 34

retains the same in contact with the trigger with-suflicient friction toprevent any abrupt "mov'ement under the inlluence of the spring 3'8,until the 'trigger has been fully released.

.When bot-h. hammers are recocked, the cam 18 alone will be actuated andwill restore thev lever to the initial position shown in Fig. 6. Byadjusting the plate or bar 20 to the left, the left barrel may'beired inadvance ot the right barrel, as will be obvious.

Perhaps the most simple embodiment of the invention is that shown inFigs. S andv 10, wherein the lever 30a is mounted on a transverselymovable plate or bar 20a, the rear arm of the lever being resilient, and being rocked 'to move between the sears and the upper iace ofthetrigger in the same man-ner as shown in Figs. 6 and 7. The forward endot the lever is provided with a double cam head 46 which is arranged tohe l l f two cams 47 and 48 that are carried on Q inner fac-esci thelevers. In the position shown-in Figs. il and l0 the right barrel may ber'ired rst, and as the hammer B springs forward the cam 4.7 will bemoved out-or engagementwith the lever 46, permitting SpringSSa-to shiftthe lever to a position underthe left'hand sear. After the left barrelhas been lired, the recoclring of bothl hammers will again bring the cam47 into engagement withv the cam head 46 and the lever will be restoredto the initial position shown in Fig. 8. By shitting position of thecarrying plate or bar 20? the operation maybe reversed and the leftbarrel tired in advance of the right ba el.

in orriler to guard against the possibility of accidental discharge dueto recoil or rebound of the gun, or convulsive movement olf the linger,a positive lock may be employed, iis lock being in the form ot a dogthat is pivotal tothe frame and is urged by spring 6l frein the positionshown in Fig. 1l to that shown in Fig. l2 when the trigger is pulled. Itwill be observed that at the completion of the 'firing movement, the dog60 will pass under v'the sear actuating lever and will `maintain thesame in elevated position, some play of the #trigger being allowed, butbefore the dog can be released it is necessary for the trigger to movefully down, and the rear end of the trigger head must engage with around ed cam 62 on the forward face of the dog in order to force thelatter to 'release position, so that the trigger must-be fully releasedbefore the lever is allowed to descend and shift into engagement withthe second sear.

l claim 1. In a single trigger mechanism for double barrel guns, atrigger, a scar actuating le` ver adapted vto oscillate from one scar toanother so as to cause the lifting of one sear in advance of the other,a 'support on which the lever is mounted, said support being bodilyshilltahlegtransversely ol the frame .so as to determine the order offiring.

Vln a single trigger mechanism for double barrel guns, a trigger, apivotally mounted sear actuating lever adapted to automaticallyoscillate from one sear to the other, a support on which the lever i-smounted, said vsupport being bodily'shiftable transversely ofthe frameand independently ofthe trigger and'adapted to changey the order offiring.

3. In a single trigger mechanism for double harrel guns, trigger, a pairof sears, a sear actuating lever, and means for automaticallyoscillating the lever from one sear to the other, a support on which thelever is pivotally mounted, said support being bodily shiltabletransversely of lthe frame and adapted when so shifted to change thefulcrum point or" the lever and the order of tiring, e'. ln a singletrigger double barrel gun, a pair of cams under the control of thehammers, a lever, the 'forward end of which is engageable by said camswhen the hammers are cocked, a shiftable ulcrum for ver, a rearwardlyprojecting arm forming a rt of the lever and normally in positionbe'twer Y the trigger and one of the sears, and means p support beingbodily and adapted to present the latter into op'- the trigger and theother sear after the iiring movement of the first hammer.

.5. In a single trigger mechanism for dou-` ble. barrel guns, a pair ofsears, a pair of hammer cntrolled cams, a lever arranged to be operatedby said a rearwardly projecting arm-arranged to eX- tend under one ofthe sears, and means for automatically' vshifting the lever to theoppo-Al site sear after the rst iringmovement, a support on which thelever is fulcrumed, said shit'table with the lever erative relation witheither sear.

6. In a single trigger double barrel gun, aA Vpair of hammer controlledcams', a pivotally mounted lever with which said cams engage whencdclred, said lever having a rearwardly extended arm" normally fittingbetween the trigger and one of the s ears, a support in which said leveris fulcrumed, said support being shiftable with the lever to pre sentthe latter into operative relation with either sear, and a spring formoving said arm into position between the trigger and the other searafter the firing movement of the vfirst hammer.

' 7. In a single triggerdouble barrel gun, a pair or' hammer controlledcams, a transversely adjustable plate or bar, a lever carried therebyand with which the cams engage, a rearwardly. extendedv arm forming apart of the lever and normally in position' between the trigger and oneof the sears', and a spring for moving' said arm 'between the triggerand the other sear after the firing movement of the iirst hammer.

8. ln a single trigger double barrel gun, a

cams, said lever having 4shaft having bearings to the rear of the breechblock, a pair of` sleeves iiulcrumedl on the shaft, rocker armsprojecting forward from the sleeves and arranged to beengaged by thelevers, cam arms depending from said heads,l aspring tending to move thearms against the hammers, a transverselyladjust! able plate carried bythe frame of the gun, a

lever 'fulcrumed to said .plate andhavlng a cam head arrangedl to beengaged by the cam' levers, arearwardly extending arm forming a part ofsaid le'ver and normally fitting be tween the trigger and one Vof thesears, a'palr of springs, arranged to engage said arms and4 shiftv thesame to a position between the trig-.l

gerand the other sear'after the iring movement of the rst hammer, beingactive when the plate is adjusted to one position and the other beingactive when the plate is. adjusted tothe other position;

one of'said springs'v 9. 'in a single 'trigger double barrel gun, a y

trigger, a laterally shiftable resilient member for transmittingmovement from the trigger ,to the sears, said member being heldfrictionally against the triggerxby its own resiliency,

for shiftingsaid member into opj

